The evaluation of chemical dissolution phenomena of the glasses in general is important because it is related to the bioactivity. This paper aims a comparative study of the bioglass dissolution between in vitro bioactivity test in SBF (Simulated Body Fluid) solution and the chemical durability test, in glasses on SiO2-Na2O-CaO with 6wt% de P2O5 system. The glasses were obtained by melting at 15...

A new family of non-toxic biocides based on low melting point (1250°C) transparent glasses with high content of ZnO (15-40wt%) belonging to the miscibility region of the B2O3-SiO2-Na2O-ZnO system has been developed. These glasses have shown an excellent biocide activity (logarithmic reduction >3) against Gram- (E. coli), Gram+ (S. aureus) and yeast (C. krusei); they are chemically stable in dif...

To understand the influence of alkali elements on incorporation mechanisms and limit iodine in borosilicate glasses used for nuclear waste immobilization, series model with different contents (22 or 35 mol% Na2O, 22 a mixture alkalis: Na substituted by Li, K Cs) were loaded (from 1 000 to 10 ppm at. under form iodide) at 1100 °C. When was reached, iodide crystals observed (e.g., NaI). For overs...

This study demonstrated the conversion of alum sludge produced at water treatment plants to high quality zeolite LTA. Thus, problems with landfilling costs and environmental contamination may be avoided. The methodology involved alkali fusion pre-treatment followed by hydrothermal synthesis improve quantity LTA made. Alum activation using facilitated formation high-quality (97 wt%) which was co...

Black shale, as an important unconventional energy resource, has attracted significant attention in recent years. By studying its sedimentary and geochemical characteristics, it is possible to reconstruct ancient depositional environments paleoclimatic conditions. The Lower Cambrian black shale widely distributed the Yangtze region, but tectonic background provenance have been subject debate. I...

In this work, we characterized the electronic structure of CdSe quantum dots embedded in a series x Na2O, (1–x) SiO2 glass matrices (x = 0, 0.25, 0.33, and 0.5). We analyzed impact matrix composition on both atomic dot (QD) QD/glass interface, as well luminescence mechanisms, using density functional theory calculations. The increase Na2O content was found to promote formation Cd–O Se–Na interf...